Brian Krzanich came in largely because Paul Otellini was unable to effectively move into the Smartphone market.
This was largely because the effort was massively under-resourced, and—rather than working with Microsoft—Intel worked against their one-time partner.

He backed the bullies against the harassed female developer in Gamergate and then publicly castigated and fired one of the top performing female CMOs in the business.
She was later replaced with a guy who was relatively unqualified for the job and was fired later on as well.

CEO Brian Krzanich laid off thousands (~11.000) of employees of the company while giving himself a $3.4M raise to $14.6M after claiming he was underpaid.

He killed the Intel Developer conference which shifted developers to ARM. Something that a chip manufacturer never wants to do.

Last but not the least we have the Spectre and Meltdown situation where he notified the Chinese long before he notified the U.S. about the major security problem with Intel parts.
He sold every Intel share he could legally sell while still remaining CEO after he knew of the problem but before it was disclosed.